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The Discovery of Primeval Large-Scale Structures with Forming Clusters at Redshift 6 | M. Ouchi
; K. Shimasaku
; M. Akiyama
; K. Sekiguchi
; H. Furusawa
; S. Okamura
; N. Kashikawa
; M. Iye
; T. Kodama
; T. Saito
; T. Sasaki
; C. Simpson
; T. Takata
; T. Yamada
; H. Yamanoi
; M. Yoshida
; M. Yoshida
; | Date: |
29 Dec 2004 | Journal: | Astrophys.J. 620 (2005) L1-L4 DOI: 10.1086/428499 | Subject: | astro-ph | Affiliation: | Hubble Fellow, STScI, U.Tokyo, Subaru, NAOJ, Durham, JWU, OAO | Abstract: | We report the discovery of primeval large-scale structures (LSSs) including two proto-clusters in a forming phase at z=5.7. We carried out extensive deep narrow-band imaging in the 1 deg^2 sky of the Subaru/XMM-Newton Deep Field, and obtained a cosmic map of 515 Ly alpha emitters (LAEs) in a volume with a transverse dimension of 180 Mpc x 180 Mpc and a depth of ~40 Mpc in comoving units. This cosmic map shows filamentary LSSs, including clusters and surrounding 10-40 Mpc scale voids, similar to the present-day LSSs. Our spectroscopic follow-up observations identify overdense regions in which two dense clumps of LAEs with a sphere of 1-Mpc diameter in physical units are included. These clumps show about 130 times higher star-formation rate density, mainly due to a large overdensity, ~80, of LAEs. These clumps would be clusters in a formation phase involving a burst of galaxy formation. | Source: | arXiv, astro-ph/0412648 | Services: | Forum | Review | PDF | Favorites |
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